Semiconductor Group

3

FP 210 D 250-22

1. Digital revolution counting

For digital revolution counting, the sensor should be actuated by a magnetically soft iron

toothed wheel. The tooth spacing should correspond to about twice the magneto resistor

intercenter spacing (see Fig. 1).

The two resistors of the sensor are supplemented by two additional resistors in order to

obtain the sensor output voltage as a bridge voltage

V

without excitation then is 0 V when the offset is compensated.

Fig. 1

Schematic representation of a toothed wheel actuating an FP 210 D 250-22

Fig. 2

Measuring circuit and output voltage